Modify Design (2-level Factorial, 2-level split-plot, and Plackett-Burman)
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Stat > DOE > Modify Design

After creating a factorial design and storing it in the worksheet, you can use Modify Design to make the following modifications:

·    rename the factors and change the factor levels.

·    replicate the design.

·    randomize the design.

·    fold the design.

·    add axial points to the design. You can also add center points to the axial block.

By default, Minitab will replace the current design with the modified design.

Dialog box items

Modification

Modify factors: Choose to rename factors or change factor levels, and then click <Specify>.

Replicate design: Choose to add up to ten replicates, and then click <Specify>.

Randomize design: Choose to randomize the design, and then click <Specify>.

Renumber design: Choose to renumber the design.

Fold design: Choose to fold the design, and then click <Specify>.

Add axial points: Choose to add axial points, and then click <Specify>. This allows you to "build" up the two-level factorial design to a central composite design. You can also add center points to the axial block. This option is not available for split-plot designs or designs with text factors.

Put modified design in a new worksheet: Check to have Minitab place the modified design in a new worksheet rather than overwriting the current worksheet.